Improvement in steam air-heaters



2 Sheets--Sheet I. J. T. 'BD N.

Steam Air-Heaters.

N0.154,368. PatentedAug.25,1874.

THE GRAPHIC COJHOTO'UTHBBliJ PARK PLACES],

UNITED ST TES PATENT Orrron.

JOHN T. BON, OF SYRACUSE, NEW YORK.

IMPROVEMENT m STEAM AIR-HEATERS.

Specification forming part of Letters Patent No. 154,368, dated August 25, 1874; app filed February 13, 1874.

To all whom it may concern:

Be it known that 1, JOHN, T. BON, of Sy racuse, New York, have invented a new and Improved Steam Air-Heater, of which the follow-in g is a specification My invention consists in the peculiar construction and combination of air and steam passages to produce a maximum efl'ect in heating air from exhaust or other steam, economisin g heat in a much greater ratio than any other device with which I am acquainted, and in forming the apparatus in cast-metal sections in a Way to avoid leakage when put together, and that cheapens the structure and renders it more durable, convenient, and efficient.

The invention is shown in the accompanying drawings, Figure 1 being a representation of the exterior of my apparatus. Fig. 2 is a vertical section on line 3 of' Fig. 1. Fig. 3 is a vertical section on line 2 of Fig. 1. p I

The letters of reference are the same for like parts inalltherfigures.

The construction is as follows: A series ofsections, of any convenientnumber and size for the purpose intended, are formed of castings. The upper one, A, made in one piece,

as seen in the drawing, extends down to the point a a, and consists of f an exterior case, in which is a zigzag or corrugated partition, I), dividing it into two chambers, a b, with a steam-opening into it at c, as hereafter more fully described. (See Fig. 2.) This chamber a communicates with a steam-chamber below through openings a and d in the side of sections A B by means of a cap, 0, that is bolted to the outside of said sections, which forms a steamway from one section to the other. Ribs f f extend downward from the corrugations of partition 11 into chamber 1), which is for the passage of air to be heated, and has an opening at each end, as seen in Fig. 3. The section B, next to the top A, has a corrugated partition, e, across it, like that before described, I), but with ribs on its upper side, so as to make an undulating passage, 1), for the air that will cause it, in its passage through, to impingea-gainst the metal surfaces and take up the heat therein rapidly and effectually. A second partition, 0, is cast in section B, parallel with and below plate c, leaving a steam-space, d, before named. This plate 0 has ribs on its under side at f f corresponding with ff, and this forms the upper side of chamber it below. Section D is just like section B, and any number of like sections may be added, as well as more or less corrugations in the partitions, according to the purpose intended, and the judgmentof the constructer, and the caps bolted to the outside of the sections form communications between the several sections, as hereafter described. The bottonr section E is divided by a corrugated partition, m, made like those above, and the bottom of the sections form the bottom of the case.- The sections are bolted together at their corners by their flangesa: w, and also along the sides under the caps.

The course of the air through this apparatus is as follows: It enters through an inletpipe or opening, a, Fig. 2, in the section next thebottom, and, passing over the partition m to openingo on the opposite side, enters cap 1), which conducts-it up into chamber h, through which it returns and passes through an opening into cap 9, and thence to and through the upper air-chamber b to the exit-opening r, the entire course being indicated by arrows in Fig. 2.

It will be noticed that the air cannot pass straight through these several chambers, bein g deflected by the corrugations and ribs, which cause all the air to come into contact with the metal, a matter of great importance in the practical result, in taking up the heat, and checking the rapidity of the current.

The course of the steam is indicated by the arrows in Fig. 3. It enters through the opening 0 into chamber a, and passes thence into cap 0, and descends into space d, through which it passes into cap t, and thence through space 8 to cap t, which conducts it into and through a to the outlet 11.

It will be noticed that from the formation of the spaces thesteam is thoroughly disseminated over the metal surfaces, which take up its which a heater of any extent can be formed, as and for the purposes specified.

2. The horizontal air-passages formed of corrugated plates, and having projecting flanges I f f, &c., upon them in a vertical position, as above specified.

JOHN T. BON.

Witnesses:

' J. J GREENOUGH,

JAS. B. BRooKs. 

